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Another Great Guistimate A HP Thread

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Another Great Guistimate A HP Thread

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Old 03-26-2009, 02:50 AM
  #11  
jivepepper
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Originally Posted by 2000AZ5.0GT View Post
I think it also depends on whether or not you get a good set of patriots. They have a bad rep of having bad valve seals, I know I've had to have mine replaced, Oxford has had his replaced, I think Defcon has his replaced
Mine were still ok after a year and clean.



Originally Posted by jthorn9 View Post
OK, well that's what I wanted to know, still a bit shy of that guys 450 rwhp number he fed my buddy.

Well with that in mind about the Patriots are there any other good head brands or are PIs more than enough? I'm probably going to have to help him with this build as I know how to strip a motor apart and he doesn't, but I'll be damned if I'm doing this twice because of bad valve seals.
Patriots are pi heads just ported. The only after market head is TFS and they still haven't released them yet.
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Old 03-26-2009, 02:53 AM
  #12  
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Oh.....OK, sorry guys, I'm used to dealing with 50 million different head companies, each with about 4-10 different lines of heads.

So, in short, Patriot heads, worth it or not, granted extra power and better flow with the S/C is a good thing, but the possible bad valve seals doesn't sound too good to me.

Is there a valve kit that comes with better seals, that way he can get a bare head kit and a good valve kit?
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Old 03-26-2009, 09:29 AM
  #13  
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Well here is something to give you an idea
I have a built short block, V-2 SQ, powerpipe, L/T's, PI heads/cams pushing 13psi and putting down around 420 to the tire
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Old 03-26-2009, 01:42 PM
  #14  
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Oh, one last question, when does the bottom end go on the 4.6L, in other words, what's its approx rwhp breaking point. I'm trying to get this through his thick skull that he'll need a built block, but just for my own sake and his convincing I'd like to know its breaking point.
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Old 03-26-2009, 01:49 PM
  #15  
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Originally Posted by jthorn9 View Post
Oh, one last question, when does the bottom end go on the 4.6L, in other words, what's its approx rwhp breaking point.
450ish
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Old 03-26-2009, 02:12 PM
  #16  
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I was strong at 436 but gone at 488.

I will be getting a new tuner at this point because my number have always been inflated and unsafe due to him running lots and lots and lots of timing. I'd take a lower numbers this time for a safer tune.

Last edited by Sxynerd; 03-26-2009 at 02:14 PM.
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